It matters. Problems are different, big or small, a problem is a problem. It's not a competition where only the one with the biggest problem can ask for help, everyone with problems can ask for help. Anxiety, depression, grief and chronic pain are not little problems really. If you feel it's little, it's good that you ask for help soon and not let it get worse. Don't feel bad about it. You're not selfish for caring about yourself when you don't feel good.